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Leases - Maturity Payments (Details) - USD ($)
$ in Millions
Jul. 31, 2025
Jul. 31, 2024
Leases [Abstract]    
2026 $ 457  
2027 436  
2028 367  
2029 280  
2030 199  
Thereafter 350  
Total undiscounted lease payments 2,089  
Less: imputed interest (275)  
Present value of liabilities $ 1,814 $ 1,593